Malicious PDF — malware analysis report

Static analysis result for SHA-256 034d0c31b8c3b98a…

MALICIOUS

PDF

76.0 KB Created: 2021-07-12 21:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fed212a365c7e64ea90c4e01e2cf6a53 SHA-1: 96645b06460cc4642b353f7301c5e5b1bf09e022 SHA-256: 034d0c31b8c3b98a8b6fd0b5a7b3aeadd59b7ad26877044e101f3b3ab67b2f8f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is directly referenced in the heuristic findings, suggesting a phishing or social engineering lure. No scripts were extracted, but the PDF structure and embedded URLs point towards an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/sq/ugae/~3/qI_NY8u86tA/square?utm_term=technology+preceded+science+in+the+history+of+civilization
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7af85978cb5ccaa9f61b/1626110712958/59480469960.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e880a02645de1562390fef/1625850016335/symptoms_of_typhoid_fever_in_adults.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91e6b18245d33f181a64d/1625890411332/jukivutinakesax.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc17.bin
ccc8c0cdeabc65b8dca4b99e74a1fc262efee9937c9f7b9a713b34c5a555ca63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC17 14976 bytes
font_01_sfnt_off0000f20e.bin
a064ad842e296212e0aa81d2a92a8f2d7b4bc4a273bcbc1bbb799ab19124c2a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF20E 11100 bytes
font_02_sfnt_off00010bc3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC3 16792 bytes

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